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jssource/src_files/include/javascript/yui3/build/dd/dd-ddm-base.js
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289
jssource/src_files/include/javascript/yui3/build/dd/dd-ddm-base.js
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/*
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Copyright (c) 2009, Yahoo! Inc. All rights reserved.
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Code licensed under the BSD License:
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http://developer.yahoo.net/yui/license.txt
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version: 3.0.0
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build: 1549
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*/
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YUI.add('dd-ddm-base', function(Y) {
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/**
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* Provides the base Drag Drop Manger required for making a Node draggable.
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* @module dd
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* @submodule dd-ddm-base
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*/
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/**
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* Provides the base Drag Drop Manger required for making a Node draggable.
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* @class DDM
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* @extends Base
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* @constructor
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* @namespace DD
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*/
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var DDMBase = function() {
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DDMBase.superclass.constructor.apply(this, arguments);
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};
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DDMBase.NAME = 'ddm';
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DDMBase.ATTRS = {
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/**
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* @attribute dragCursor
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* @description The cursor to apply when dragging, if shimmed the shim will get the cursor.
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* @type String
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*/
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dragCursor: {
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value: 'move'
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},
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/**
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* @attribute clickPixelThresh
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* @description The number of pixels to move to start a drag operation, default is 3.
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* @type Number
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*/
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clickPixelThresh: {
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value: 3
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},
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/**
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* @attribute clickTimeThresh
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* @description The number of milliseconds a mousedown has to pass to start a drag operation, default is 1000.
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* @type Number
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*/
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clickTimeThresh: {
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value: 1000
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},
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/**
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* @attribute dragMode
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* @description This attribute only works if the dd-drop module is active. It will set the dragMode (point, intersect, strict) of all future Drag instances.
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* @type String
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*/
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dragMode: {
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value: 'point',
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setter: function(mode) {
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this._setDragMode(mode);
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return mode;
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}
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}
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};
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Y.extend(DDMBase, Y.Base, {
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/**
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* @property _active
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* @description flag set when we activate our first drag, so DDM can start listening for events.
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* @type {Boolean}
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*/
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_active: null,
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/**
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* @private
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* @method _setDragMode
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* @description Handler for dragMode attribute setter.
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* @param String/Number The Number value or the String for the DragMode to default all future drag instances to.
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* @return Number The Mode to be set
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*/
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_setDragMode: function(mode) {
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if (mode === null) {
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mode = Y.DD.DDM.get('dragMode');
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}
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switch (mode) {
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case 1:
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case 'intersect':
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return 1;
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case 2:
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case 'strict':
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return 2;
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case 0:
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case 'point':
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return 0;
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}
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return 0;
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},
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/**
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* @property CSS_PREFIX
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* @description The PREFIX to attach to all DD CSS class names
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* @type {String}
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*/
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CSS_PREFIX: 'yui-dd',
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_activateTargets: function() {},
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/**
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* @private
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* @property _drags
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* @description Holder for all registered drag elements.
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* @type {Array}
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*/
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_drags: [],
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/**
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* @property activeDrag
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* @description A reference to the currently active draggable object.
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* @type {Drag}
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*/
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activeDrag: false,
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/**
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* @private
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* @method _regDrag
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* @description Adds a reference to the drag object to the DDM._drags array, called in the constructor of Drag.
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* @param {Drag} d The Drag object
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*/
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_regDrag: function(d) {
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if (this.getDrag(d.get('node'))) {
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return false;
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}
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if (!this._active) {
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this._setupListeners();
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}
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this._drags.push(d);
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return true;
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},
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/**
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* @private
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* @method _unregDrag
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* @description Remove this drag object from the DDM._drags array.
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* @param {Drag} d The drag object.
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*/
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_unregDrag: function(d) {
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var tmp = [];
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Y.each(this._drags, function(n, i) {
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if (n !== d) {
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tmp[tmp.length] = n;
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}
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});
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this._drags = tmp;
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},
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/**
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* @private
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* @method _setupListeners
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* @description Add the document listeners.
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*/
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_setupListeners: function() {
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this._active = true;
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var doc = Y.get(document);
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doc.on('mousemove', Y.bind(this._move, this));
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//Y.Event.nativeAdd(document, 'mousemove', Y.bind(this._move, this));
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doc.on('mouseup', Y.bind(this._end, this));
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},
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/**
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* @private
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* @method _start
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* @description Internal method used by Drag to signal the start of a drag operation
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*/
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_start: function() {
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this.fire('ddm:start');
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this._startDrag();
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},
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/**
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* @private
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* @method _startDrag
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* @description Factory method to be overwritten by other DDM's
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* @param {Number} x The x position of the drag element
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* @param {Number} y The y position of the drag element
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* @param {Number} w The width of the drag element
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* @param {Number} h The height of the drag element
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*/
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_startDrag: function() {},
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/**
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* @private
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* @method _endDrag
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* @description Factory method to be overwritten by other DDM's
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*/
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_endDrag: function() {},
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_dropMove: function() {},
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/**
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* @private
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* @method _end
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* @description Internal method used by Drag to signal the end of a drag operation
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*/
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_end: function() {
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if (this.activeDrag) {
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this._endDrag();
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this.fire('ddm:end');
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this.activeDrag.end.call(this.activeDrag);
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this.activeDrag = null;
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}
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},
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/**
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* @method stopDrag
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* @description Method will forcefully stop a drag operation. For example calling this from inside an ESC keypress handler will stop this drag.
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* @return {Self}
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* @chainable
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*/
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stopDrag: function() {
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if (this.activeDrag) {
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this._end();
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}
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return this;
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},
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/**
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* @private
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* @method _move
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* @description Internal listener for the mousemove DOM event to pass to the Drag's move method.
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* @param {Event.Facade} ev The Dom mousemove Event
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*/
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_move: function(ev) {
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if (this.activeDrag) {
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this.activeDrag._move.call(this.activeDrag, ev);
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this._dropMove();
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}
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},
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/**
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* //TODO Private, rename??...
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* @private
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* @method cssSizestoObject
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* @description Helper method to use to set the gutter from the attribute setter.
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* @param {String} gutter CSS style string for gutter: '5 0' (sets top and bottom to 5px, left and right to 0px), '1 2 3 4' (top 1px, right 2px, bottom 3px, left 4px)
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* @return {Object} The gutter Object Literal.
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*/
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cssSizestoObject: function(gutter) {
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var x = gutter.split(' ');
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switch (x.length) {
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case 1: x[1] = x[2] = x[3] = x[0]; break;
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case 2: x[2] = x[0]; x[3] = x[1]; break;
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case 3: x[3] = x[1]; break;
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}
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return {
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top : parseInt(x[0],10),
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right : parseInt(x[1],10),
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bottom: parseInt(x[2],10),
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left : parseInt(x[3],10)
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};
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},
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/**
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* @method getDrag
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* @description Get a valid Drag instance back from a Node or a selector string, false otherwise
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* @param {String/Object} node The Node instance or Selector string to check for a valid Drag Object
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* @return {Object}
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*/
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getDrag: function(node) {
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var drag = false,
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n = Y.get(node);
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if (n instanceof Y.Node) {
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Y.each(this._drags, function(v, k) {
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if (n.compareTo(v.get('node'))) {
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drag = v;
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}
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});
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}
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return drag;
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}
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});
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Y.namespace('DD');
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Y.DD.DDM = new DDMBase();
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/**
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* @event ddm:start
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* @description Fires from the DDM before all drag events fire.
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* @type {Event.Custom}
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*/
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/**
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* @event ddm:end
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* @description Fires from the DDM after the DDM finishes, before the drag end events.
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* @type {Event.Custom}
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*/
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}, '3.0.0' ,{requires:['node', 'base'], skinnable:false});
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